@inproceedings{hu2021vivo,
  title={VIVO: Visual Vocabulary Pre-Training for Novel Object Captioning},
  author={Hu, Xiaowei and Yin, Xi and Lin, Kevin and Wang, Lijuan and Zhang, Lei and Gao, Jianfeng and Liu, Zicheng},
  booktitle={Proceedings of the AAAI Conference on Artificial Intelligence},
  year={2021},
}